Toggle type window lock



5, 1963 w. .1. ANDERSON TOGGLE TYPE wmnow LOCK 3 Sheets-Sheet 1 Filed July 10, 1961 W. J. ANDERSON TOGGLE TYPE WINDOW LOCK Nov. 5, 1963 Filed July 10, 1961 3 Sheets-Sheet 2 I I I z I fi/enz or 1411/1012? (192241913012 1963 w. J. ANDERSON 3,109,675

TOGGLE TYPE WINDOW LOCK Filed July 10, 1961 3 Sheets-Sheet 5 1 82? for wf/z'azzz (Z flzzaezzs'ozz aw m MW United States Patent Ofiice 3,139,575 Patented Nov. 5, 1963 9 Claims. (Cl. 292-469) This invention relates to a toggle type window lock, and more particularly to a toggle type lock for use with double hung windows having adjacent upper and lower sashes which ride in adjacent trackways to form a window.

The lock of the present invention is especially adapted for use on windows employing double panes of glass with an air space therebetween, where because of the overall thickness of the window structure, the inner surface of the lower horizontal sash rail of the upper sash is reduced in width thereby permitting only a nanrow lock part to be mounted thereon. This toggle type window lock has as one of its two cooperating parts a narrow catch which is conveniently mounted upon such a narrowed sash rail. The other part of the lock is comprised of a cap and associated elements which cooperate with the catch in locking the window. The cap is designed to have a top surface free of cavities which might act as dust catchers, in a manner similar to the cavities heretofore built into window locks generally used in the trade.

A first object of the present invention is to provide a window lock wherein at least one of the parts is sufficiently narrow in width as to be capable of being mounted upon a narrow window sash nail.

A second object is to provide a lock structure in which dust catching cavities have been eliminated from the top surface thereof.

A third object is to provide a lock which when in its locking engagement, forces the window sashes together in a manner to affect a seal-like closure therebetween.

A still further object of the present invention is to provide a window lock which when the window is unlocked indicates that fact, even from a distance.

These and other objects will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of the lock in looking engagement;

:FIG. 2 is a perspective view of the lock in a first position of being unlocked;

FIG. 3 is a perspective view of the lock with the locking parts disengaged;

FIG. 4 is a perspective view of the lock with the cap in an upright position indicating that the window is unlocked;

FIGS. 5, 6 and 7 are side views of the lock corresponding to the perspective views of FIGS, 1, 2 and 4, respectively;

FIG. 8 is a front view of the unlocked mechanism as viewed from line 88 of FIG. 7, and,

FIG. 9 is a plan view of the lock;

FIGS. 10 and 11 are vertical side views of a modification of the lock in different locking positions;

FIG. 12 is a vertical side view of a further modification of the lock showing the use of a split cap.

As shown in the drawings, and referring first to FIG. 1, the window lock 10 of the-present invention is comprised of two major cooperating parts, namely, a cap 11 which with its associated elements is mounted to the top surface of the upper horizontal sash rail 16 of the lower sash of a double hung window, and a catch 12 which is mounted upon the inner surface of the lower horizontal sash rail 13 of the upper sash of a double hung window. As can be seen from the drawings, sash rail 13 at its inner surface, is relatively much narrower by comparison with the top surface of the sash rail 16, this being because of the glass panes mounted in the sash. The catch 12, the narrower of the two major locking parts, is therefore mounted upon this inner surface of sash rail 13 as by screws 14. The said catch is comprised of a base for mounting to a window sash rail and an upright portion which defines an opening 21 therein for cooperating with a latching element, such as cap hook 17, when in locking engagement as seen in FIGS. 5 and 6.

The cap 11 of the lock 10, being the wider of the two major cooperating lock parts, has associated with it all of the movable elements of the lock, as seen in FIGS. 3 and 4. Also, being the wider part of the lock, the cap 11 and its associated elements are mounted upon the relatively wider top surface of the horizontal sash. nail 16 of the lower sash of the double hung window.

Integral with the cap 11 at the leading edge thereof, that edge immediately adjacent the catch 12, is located a hook 17 which engages the catch 12 when the mechanism is in looking engagement. At the opposite or trailing edge thereof the cap 11 is pivotally mounted upon links 25 and 26 by means of a pivot pin 23. The links 25 and 26 are in turn pivotally mounted at the ends thereof opposite their connection with the cap 11, upon the upright arms 31 and 29 of the mounting base 22 as by pivot pin 24. The links 25 and 26 are joined together by the cross bar 30, which lends rigidity and strength to the link structure.

Also, associated with the cap 11 and base 22 are two torsion springs 18 and 19, which springs function to bias the cap 11 into an upright position upon the cap hook 17 becoming disengaged from the catch 12, thereby indicating that the window is unlocked.

This locking operation of the toggle type lock 19 is depicted in the drawings FIGS. 1 through 4, and is accomplished by grasping the trailing end of the cap 11 opposite the cap hook 17 and elevating said end as shown in FIG. 2. With the cap in this position it is moved forward in a direction toward the catch 12 and this forward movement permits the cap hook 17 to become disengaged from the catch 12. When the hook 17 becomes disengaged from the catch, the torsion spring 18 forces the leading edge of the cap upwardly away from the catch as seen in FIG. 3. Simultaneously therewith torsion spring 19 forces the trailing edge of cap 11 downwardly upon the base 22. When the cap has thus been forced into an upright position it acts as an indicator of the fact that the window is unlocked.

It is to be understood that although in the embodiment shown the torsion springs 18 and 19 are mounted on pivot pins 23 and 24 respectively, their positions can be otherwise changed Without adecting the operation of the lock, for example, the spring 19 could also be mounted on pivot pin 23 to bias the cap downwardly upon the base 22.

The locking operation of the toggle type lock it is accomplished by grasping the cap 11 in the proximity of pivot pin 23, tilting the cap forwardly about pivot pin 24 by elevating links 25 and 26 in a manner to permit the cap hook 17 to be extended over the catch 12. The cap hook 17 is then made to pass through the catch opening 21 by moving the leading edge thereof downwardly and rearwardly until the hook 17 is through the opening 21. A further downward pressure upon the cap 11 causes links 25 and 26 to become partially seated within the underside of the cap. In this position the underside of the cap 11 rests upon the leading ends 27 and 28 of the upright arms 31 and 29, which leading ends function as fulcrums about which the cap 11 pivots to draw the catch 12 and the sash to which it is mounted inwardly and upwardly. This locking engagement of 3 the lock parts causes the opening between the adjacent sashes to become tightly closed as seen in FIG. 5, thereby making tapering with the lock from without practically impossible and precludes the entrance of dust or other elements from entering therethrough.

A further advantage of the present lock, over the window locks commonly used heretofore, is that the cap 11 of the present lock becomes an indicator of the fact that the window is unlocked upon its becoming dis engaged from the catch 12 as is seen in FIGS. 7 and 8. This action as heretofore explained is automatic because of the biasing actions of the torsion springs 18 and 19.

In the modification of the lock shown in FIGS. and 11 a base 32 is secured to the upper sash rail of a lower sash 33, as by the wood screw 34. Integral with the base 32 are a pair of spaced upright arms 35, one of which arms is not shown since it is identical with the one shown only rising from the opposite end of the base. Pivotally mounted upon said upright arms 35 are a pair of links 36, as at pivot pin 37. A cap 38 is pivotally mounted at the opposite ends of the links 36 as at the pivot pin 39. In keeping with the structure of the present invention, there is located at the leading edge of the cap 38 a latching element, such as a hook 41.

On the adjacent lower sash rail of an upper sash 42 is mounted a catch 43 as by the wood screw 44. Also shown mounted in the lower sash rail of the sash 42 is a pane of glass 45.

This modification of the lock uses shorter links 36 which are mounted on the upright arms 35 some distance back from the edge of the sash rail. By mounting the links in this position, the lock may be used to permit limited opening of the window for ventilation purposes. When used in this manner, the hook 41 and catch 43 remain in engagement to prevent the window from being fully opened.

A second modification of the present lock is shown in FIG. 12. A base 46 of this embodiment of the invention is mounted upon the upper sash rail of a lower sash 47. Integral with the base 46 are upright arms 48 one of which is not shown it being directly behind the 'one shown and identical therewith and rising from the opposite end of the base. Upon the upright arms 48 is pivotally mounted the rear portion 49 of the split cap 51, as at the pivot pin 52. Extensions 53a of the forward portion 53 of the cap are pivotally attached to the middle of the rear portion 49 of the cap 51, as at the pivot pin 54 to provide a toggle arrangement somewhat similar to those already described.

On the lower sash rail of the adjacent upper sash 56 is mounted a clasp 57 which engages the hook 55 in a window locking engagement. If desired, a catch with an opening to receive the hook 55 may be used as the full equivalent of the clasp. Also mounted in the upper sash is a pane of glass 58.

This second modification eliminates the use of separate link members for pivoting the cap. Thus, by splitting the cap into the portions shown, the cap itself is made to function as the pivoting links to form the toggle mechanism.

In summary, the lock of the invention is an improvement over window locks heretofore used because it provides a modern or contemporary style lock suitable for being installed on windows in which the sash rails, due to the window structure, are restricted in width, leaving a limited work surface upon which to mount a lock. operationally, the present lock provides a toggle type arrangement of parts which cooperate with a catch mounted upon an adjacent sash to cause, when engaged, a closure between the adjacent sashes which because of its tightness is highly tamperproof and eifective against dust and weather conditions. Further, upon disengagement of the parts, the cap acts as an indicator to indicate the fact that the window is unlocked, even from distances remote from the window. As indicated the device, when properly proportioned, may also be used to permit opening of the window to a limited extent.

It is to be understood that the above disclosure and drawings are directed to preferred embodiments of the invention and that other embodiments which fall within the scope of the appended claims will occur to those skilled in the art, and such other embodiments are also intended to be covered by the claims.

Invention is claimed as follows:

1. A lock for a double-hung window having a bottom sash with a top rail with an outer face, and a top sash with a bottom rail and an inner face in juxtaposition to said outer face, said lock including: a catch having an upright portion with an opening therethrough, said catch being adapted to be affixed to said bottom rail with said upright portion extending upwardly from the bottom rail adjacent said inner face thereof; a latching hook extending about the top of the catch and into said opening from the outward side of the catch and engaging said catch; and toggle means attached to said hook and adapted to be attached to said top rail of the bottom sash to urge said catch toward the bottom sash, said toggle means being pivotable toward the upper sash whereby said hook may be disengaged from said catch to permit one or both of the windows to be moved with respect to the other.

2. In combination: a double hung window having a bottom sash with a top rail and a top sash with a bottom rail, and a lock therefor; said lock comprising a catch mounted upon said bottom rail and having an upright portion with an opening therethrough, an arcuate latching hook extending about the top of the catch and into said opening from the outward side of the catch to engage the same, and toggle means attached to said'hook and to said top rail and adapted to pull said top sash toward said bottom sash, said toggle means including a mounting base afixed to said top rail, spaced arms affixed to said base and extending upwardly therefrom, a pair of links pivotally connected to said arms respectively and extending inwardly therefrom, and a cap pivotally connected to the inward ends of said links and extending outwardly above said arms, said hook being aifixed to the outward portion of said cap, the structure and arrangement being such that said cap may be operated about thepivotal connections to engage and disengage said hook and said catch and said arms provide fulcrums for engagement by said cap when said upper sash is not entirely closed whereby said upper sash is drawn upwardly and toward said lower sash as said cap is moved down to locked position of said toggle means.

3. A lock for a double-hung window having a bottom sash with a top rail with an outer face, and a top sash with a bottom rail and an inner face in juxtaposition to said outer face, said lock including: a catch having an upright portion with an opening therethrough, said catch being adapted to be affixed to said bottom rail with said upright portion extending upwardly from the bottom rail adjacent said inner face thereof; a latching hook adapted to extend about the top of the catch and into said opening from the outward side of the catch to engage said catch; and toggle means attached to said hook and adapted to be attached to said top rail of the bottom sash to urge said catch toward the bottom sash, said toggle means including a mounting base adapted to be affixed to said top rail, spaced arms iafiixed to said base and extending upwardly therefrom, a pair of links pivotally connected to said arms respectively and extending inwardly therefrom, a first pin extending between said links and said arms and forming the pivotal conection therebetween, a second pin extending between the downwardly extending sides of the cap and the inward ends of the links and forming the pivotal connection between the cap and links, a first spring means encircling the first pin and resiliently urging the inward ends of said links downwardly, a second spring means encircling the second pin and resiliently urging the outward portion of the cap in an upwardly direction, and a cap pivotally connected to the inward ends of said links and extending outwardly above said arms, said cap comprising a top with downwardly extending sides, said hook being affixed to the outward portion of said cap, the arrangement being such that the cap and hook of the toggle means may be pivoted upwardly and toward the upper sash and said hook may be disengaged from said catch to permit one or both of the windows to be moved with respect to the other.

4. A lock for a double-hung window having a bottom sash with a top rail with an outer face, and a top sash with a bottom rail and an inner face in juxtaposition to said outer face, said lock including: a catch having a base adapted to be affixed to said bottom rail and an upright portion extending upwardly from said base and having engaging means on the top thereof; a latching hook adapted to extend about the top of the catch from the outward side thereof for positive engagement with said engaging means; toggle means adapted to be attached to the top rail and including as one lever a cap attached to said hook and pivotable to cause said hook to engage or disengage said catch and to draw said catch toward said toggle means, and fulcrum means engageable by said cap to draw said catch upwardly when it is engaged by said hook at a level below that of said toggle means as said cap is moved toward locked position of said toggle means.

5. A lock in accordance with claim 4 wherein the engaging means of the catch comprises a bar formed by an opening in the upright portion thereof.

6. A lock for a doable-hung window having a bottom sash with a top rail with an outer face, and a top sash with a bottom rail and an inner face in juxtaposition to said outer face, said lock including: a catch having a base adapted to be affixed to said bottom rail and an upright portion extending upwardly from said base and having engaging means on the top thereof; a latching hook adapted to extend about the top of the catch from the outward side thereof for positive engagement with said engaging means; and toggle means attached to said hook and adapted to be attached to said top rail of the bottom sash to urge said catch toward the bottom sash, said toggle means including a mounting base adapted to be affixed to said top rail, spaced arms ailixed to said base and extending upwardly therefrom, a pair of links pivotally connected to said arms respectively and extending inwardly therefrom, and a cap pivotally connected to the inward ends of said links and extending outwardly above said arms, said hook being affixed to an outward portion of said cap, said spaced arms being dimensioned to pnovide fulcrum means to be engaged by the cap to cause the catch-engaging hook to move upwardly as the inward portion of the cap is moved downwardly in locking a window, the arrangement being such that the cap and hook of the toggle means may be pivoted upwardly and toward the upper sash and said hook may be disengaged from said catch to permit one of the windows to be moved with respect to the other.

7. A lock in accordance with claim 6 wherein the engaging means of the catch comprises a bar formed by an opening in the upright portion thereof.

8. A lock for a double-hung window having a bottom sash with a top rail and with an outer face and top sash with a bottom rail and an inner face in juxtaposition to said outer face, said lock including: a catch having a base adapted to be afiixed to said bottom rail, an upright portion affixed to the base and extending upwardly therefrom, and engaging means on the top of the upright portion; a latch hook having means adapted to positively engage said engaging means from the outward side of the upright portion and extending inwardly about the top of the catch; and toggle means attached to said hook and adapted to be attached to said top rail of the bottom sash to urge said catch toward the bottom sash, said toggle means comprising a mounting base adapted to be affixed to said top rail, spaced anms attached to said base and extending upwardly therefrom, a U-shaped toggle handle member having the extremities thereof pivotally connected to said arms respectively, a U-shap'ed toggle latch member having the extremities thereof pivotally connected to the sides of said U-shaped toggle handle member, a first pin extending between said arms of said base and forming the pivotal connection between the U-shaped toggle handle member and said arms, a second pin extending between the sides of the U-shaped toggle handle member and forming the pivotal connection between the U-shaped toggle latch member and the sides of said U-shaped toggle handle member, a first spring means encircling said first pin and resiliently urging said U- shaped toggle handle member inwardly and downwardly, and a second spring means encircling said second pin and resiliently urging said U-shaped toggle latch member upwardly and inwardly, said latch hook being affixed to the median portion of said U-shaped toggle latch member, whereby by operating said toggle means said book may be engaged with said catch to look a window and disengaged therefrom to permit opening of the window.

9. In combination: a double-hung window having a bottom sash with a top rail and a top sash with a bottom rail, and a lock therefor; said lock comprising a catch mounted upon said bottom rail and having an upright portion having engaging means on the top thereof, an arcuate latching hook extending about the top of said catch for positive engagement therewith from the outward side of said catch, and toggle means attached to said hook and to said top rail and adapted to pull said top sash toward said bottom sash, said toggle means including a mounting base affixed to said top rail, spaced arms affixed to said base and extending upwardly therefrom, a U- shaped toggle handle member having the extremities thereof pivotally connected to said arms respectively, a U-shaped toggle latch member having the extremities thereof pivotally connected to the sides of said U-shaped toggle handle member, said hook "being affixed to the median portion of said U-shaped toggle latch member, the structure and arrangement being such that said latch member may be operated about the pivotal connections to engage and disengage said hook and said catch and said arms provide fulcrums for engagement by said U- shaped toggle latch member when said window is not entirely closed whereby the upper and lower sash are moved to closed position of the window and toward each other as said U-shaped toggle handle member is moved down to lock position of said toggle means.

References Cited in the file of this patent UNITED STATES PATENTS 2,560,827 Segesman July 17, 1951 2,602,685 Martinet et al. July 8, 1952 2,829,912 Koch Apr. 8, 1958 

1. A LOCK FOR A DOUBLE-HUNG WINDOW HAVING A BOTTOM SASH WITH A TOP RAIL WITH AN OUTER FACE, AND A TOP SASH WITH A BOTTOM RAIL AND AN INNER FACE IN JUXTAPOSITION TO SAID OUTER FACE, SAID LOCK INCLUDING: A CATCH HAVING AN UPRIGHT PORTION WITH AN OPENING THERETHROUGH, SAID CATCH BEING ADAPTED TO BE AFFIXED TO SAID BOTTOM RAIL WITH SAID UPRIGHT PORTION EXTENDING UPWARDLY FROM THE BOTTOM RAIL ADJACENT SAID INNER FACE THEREOF; A LATCHING HOOK EXTENDING ABOUT THE TOP OF THE CATCH AND INTO SAID OPENING FROM THE OUTWARD SIDE OF THE CATCH AND ENGAGING SAID CATCH; AND TOGGLE MEANS ATTACHED TO SAID HOOK AND ADAPTED TO BE ATTACHED TO SAID TOP RAIL OF THE BOTTOM SASH TO URGE SAID CATCH TOWARD THE BOTTOM SASH, SAID TOGGLE MEANS BEING 